초록

본 연구에 사용되어진 마루자주새우 (Crangon hakodatei)는 거제도 주변 해역에서 2000년 10월부터 2001년 10월까지 새우조망을 이용하여 매월 채집하였다. 이들 개체군의 구조, 성장, 사망 및 성 성숙에 관한 분석은 갑각장을 이용한 체장빈도 데이터를 이용 ELEFAN 프로그램에 의해 분석하였다. 성장계수의 추정은 변형된 von Bertalanffy 성장식을 이용하였다. 암컷이 수컷보다 성장이 빨라 성숙개체에 빨리 도달하는 것으로 나타났다. 체장변환 어획 곡선에 의해 구해진 전 사망계수는 $3.10yr^{-1}$로 나타났고, Pauly 식에 의해 산출된 자연사망계수는 $2.48yr^{-1}$로 나타났다. 또한 어획사망계수는 $0.62yr^{-1}$인 것으로 나타났다. 암컷의 성 성숙 개체의 크기는 갑각장 $11.00\~11.50$ mm 사이인 것으로 나타났다.

Abstract

The sand shrimp, Crangon hakodatei commonly occured in the southern coast of Korea. The population structure, growth, mortality, and size at sexual maturity of C. hakodatei were examined by the samples collected from the coastal area of Geoje Island, Korea from October 2000 to October 2001. For estimation of parameters of growth and mortality, monthly length-frequency data were analysed by ELEFAN. Parameters of growth were estimated, using the modified yon Bertalanffy growth function model. The female grew faster and reached larger size at the same age than the male, There was a breeding season showing a peak in winter (January to february). Total mortality by length-converted catch curve was estimated at $3.10 yr^{-1}$, fishing mortality was $0.62 y^{-1}$ and natural mortality was $2.48 yr^{-1}$. The size at $50\%$ sexual maturity for the female ranged from CL 11.00 to 11.50 mm.

주제어

#Crangon hakodatei   #Growth   #Breeding season   #Mortality   #Size at sexual maturity  

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